RFS4000 act as router to cable modem?

I am having difficultly getting an RFS4000 to connect to my ISP through my cable modem. I am new to AP controllers. I would assume(correct me if I am wrong) that the RFS4000 could replace my router. I also have 2 APs that I am going to deploy with the RFS4000.

looks like you have the default config on it. Since you are still learning you may be better off using the Initial Setup Wizard. Please log in to the controller via GUI. Then click on the configuration tab, once there look for "Initial Setup Wizard" button on the bottom of the page.

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